JPH0541029U - Grommet - Google Patents

Abstract

(57) [Summary] [Purpose] The grommet 1 can be mounted regardless of the presence or absence of the burring 25 of the panels 23 and 27. [Composition] A first fitting groove 21a for fitting the flange portion 9 of the hard grommet 3 to the soft grommet 5 when mounted on the panel 23 without the burring 25, and a fitting when mounted on the panel 27 having the burring 25. Second fitting groove 21
b is provided, and the fitting groove to be fitted is changed depending on the presence or absence of the burring 25.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a grommet that is mounted on a vehicle panel and holds a bundle of electric wires that penetrates the panel.

[0002]

[Prior Art]

 When penetrating an electric wire bundle or the like through the panel, a method of attaching the electric wire bundle or the like to the panel via a grommet is known in order to prevent the electric wire bundle or the like from being damaged at the penetrating portion. Among such grommets, one of the so-called two-body grommets for sandwiching and fixing the panel from both sides is shown in, for example, FIG. 6 (see Japanese Utility Model Laid-Open No. 2-418686).

As shown in FIG. 6, the grommet 101 is composed of a hard grommet 103 and a soft grommet 105, and a wire bundle or the like is penetrated through the central portion of the hard grommet 103 which is formed of synthetic resin into a substantially cylindrical shape. A through hole 107 is provided. A flange portion 109 is provided on the outer periphery of one end of the hard grommet 103 at right angles to the axial direction, and four flexible lock claws 111 are provided on the outer periphery of the other end at equal intervals. Locking step portions 111a are formed at the tips of the flexible lock claws 111, respectively, and a predetermined gap e is formed between the locking step portions 111a and the flange portion 109. There is.

On the other hand, the soft grommet 105 has a base 113 formed in a substantially cylindrical shape as shown in FIG. 6, a flange 115 provided on the outer periphery of one end of the base 113, and an open end surface of the flange 115. The elastic seal part 117 is provided, and these are integrally formed by a rubber member. A through hole 119 into which a bundle of wires or the like is inserted is provided in the central portion of the soft grommet 105, and a fitting recess 121 into which the flange portion 109 of the hard grommet 103 is fitted is formed in the entire inner wall of the flange 115. It is provided.

When the flange 109 is fitted in the fitting recess 121, the hard grommet 103 and the soft grommet 105 are combined and integrated, and the hard grommet is formed in the hole 123 of the diameter D formed in the panel 125. When 103 is inserted, the flexible lock claw 111 protrudes to the opposite side of the panel 125 as shown in FIG. 7, and the panel 125 and the elastic seal part 117 cause the flange part 109 and the locking step part of the flexible lock claw 111. It is sandwiched by 111 a.

At this time, since the elastic seal portion 117 is deformed by a predetermined amount, the grommet 101 is surely attached to the panel 125 by the elastic force of the elastic seal portion 117 and the hole portion 123 can be effectively sealed. .. The distance e between the flange portion 109 and the locking step portion 111a of the flexible lock claw 111 is set so that the elastic seal portion 117 is deformed appropriately.

[0007]

[Problems to be solved by the device]

 However, in such a conventional grommet 101, for example, when the hard grommet 103 that can be mounted on the panel 125 is inserted into the hole of the panel 129 having the burring 127, the flange portion 109 and the flexibility are increased. Since the gap e between the lock claw 111 and the locking step 111a is too small, the flexible lock claw 111 does not project to the opposite side of the panel 129 as shown in FIG. Therefore, for the panel 129 having the burring 127, the gap f between the flange portion 131 and the locking step portion 133a of the flexible lock claw 133 is set to be larger than e as shown in FIG. The enlarged hard grommet 135 is used to mount the panel 129 as shown in FIG.

Therefore, in the conventional grommet 101, only the presence or absence of the barring 127 of the panels 125 and 129 to which the conventional grommet 101 is attached allows the flange portions 109 and 131 and the flexible lock claws 111 and 133 to be attached to the same soft grommet 105. Since a plurality of types of hard grommets 103 and 135 having different distances from the locking step portions 111a and 133a are required, there is a problem in that the number of necessary components increases.

The present invention has been made in order to solve such a conventional problem, and an object thereof is to obtain the same grommet without substituting the hard grommet with or without the burring of the panel. The purpose of the present invention is to provide a grommet that can be reliably mounted on a panel and that can achieve high sealing performance when mounted.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a configuration in which a plurality of fitting recesses into which a flange portion of a hard grommet is fitted are provided in a base portion of a soft grommet.

[0011]

[Action]

 When the flange portion of the hard grommet is fitted into one fitting recess of the soft grommet, the tip of one end of the soft grommet and the flexible locking claw of the hard grommet will have a predetermined gap, and in this state, the hard grommet will When fitted in a panel hole that does not exist, the flexible lock claw and flange of the hard grommet sandwich the panel and one end of the soft grommet, and at this time, one end of the soft grommet has a predetermined amount. Since it only deforms and presses the panel, the grommet is securely attached and the hole can be effectively sealed.

Further, when the flange portion of the hard grommet is fitted to the other fitting recess located on the one end side of the one fitting recess, the tip of the one end of the soft grommet and the flexibility of the hard grommet. The space between the hard lock grommet and the flexible lock hook of the hard grommet is larger than the predetermined gap by the space between the fitting recesses, and when the hard grommet is fitted into the panel hole with the burring in this state. And the flange part sandwich the burring part of the panel and one end of the soft grommet.At this time, one end of the soft grommet deforms by a predetermined amount and presses the panel as in the case of mounting, so the grommet. Is securely installed, and the hole can be effectively sealed.

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial front cross-sectional view of a grommet according to an embodiment of the present invention, and FIGS. 2 and 4 are cross-sectional views of a main part when the soft grommet and the hard grommet of FIG. 1 are combined. 3 and 5 are cross-sectional views of a main part when a hard grommet combined with a soft grommet is attached to a panel.

The grommet 1 is composed of a hard grommet 3 and a soft grommet 5. The hard grommet 3 is made of synthetic resin into a substantially cylindrical shape, and a wire bundle or the like is formed in the center thereof, as in the conventional one. A through hole 7 that penetrates through is provided. A flange portion 9 is provided on the outer periphery of one end of the hard grommet 3 at a right angle to the axial direction, and four flexible lock claws 11 are provided on the outer periphery of the other end at equal intervals. Locking step portions 11a are respectively formed at the tips of the flexible locking claws 11, and a predetermined gap g is provided between the locking step portions 11a of the flexible locking claws 11 and the flange portion 9. Is formed in.

The soft grommet 5 also has the same basic structure as the conventional one, and has a base 13 formed in a substantially cylindrical shape, a flange 15 provided on the outer periphery of one end of the base, and a flange 15. It is composed of an elastic seal portion 17 as one end portion of the soft grommet 5 provided on the open end face, and these are integrally formed by a rubber member. The distance from the open end surface of the collar portion 15 to the tip of the elastic seal portion 17 is the reference length A, and the central portion of the soft grommet 5 is provided with a through hole 19 for inserting and fixing a wire bundle or the like. Has been. Further, a first fitting groove 21a and a second fitting groove 21b as fitting recesses into which the flange portion 9 of the hard grommet 3 is fitted are provided on the entire inner wall of the flange portion 15. The fitting groove 21a is located on the base portion 13 side, the second fitting groove 21b is located on the elastic seal portion 17 side, and the two fitting grooves 21a and 21b have a predetermined distance X.

When the flange portion 9 of the hard grommet 7 is fitted into the fitting grooves 21a and 21b provided in the soft grommet 5, the hard grommet 3 and the soft grommet 5 are combined as shown in FIGS. 2 and 4. Become one.

Here, the gap between the tip of the elastic seal portion 17 and the locking stepped portion 11a of the flexible lock claw 11 is the distance Y when the flange portion 9 is fitted in the fitting groove 21a, and the fitting is performed. When fitted in the groove 21b, the distance Z is set. The gap Y is set to be smaller than the thickness t of the smooth panel 23 on which the grommet 1 is mounted, and the gap Z is smaller than the burring height h of the panel 27 having the burring 25 by a proper amount. It is set.

When the grommet 1 is mounted on the smooth panel 23 having the thickness t, the flange portion 9 of the hard grommet 3 is fitted into the first fitting groove 21a of the soft grommet 5 as shown in FIG. The hard grommet 3 and the soft grommet 5 are integrated, and the hard grommet 3 of the integrated grommet 1 is inserted into the hole 29 of the panel 23 and fitted. When the hard grommet 3 is fitted into the hole 29 of the panel 23, the flexible lock claw 11 projects to the opposite side of the panel 23 as shown in FIG. 3, and the flange 9 and the locking step 11a of the flexible lock claw 11 are engaged. Is in a state of sandwiching the panel 23 and the elastic seal portion 17.

Here, the gap Y between the tip of the elastic seal portion 17 and the locking step 11a of the flexible lock claw 11 is set to be smaller than the thickness t of the panel 23 by an appropriate amount, and Since the gap g between the locking step portion 11a of 11 and the flange portion 9 is kept constant and the elastic seal portion 17 is deformed more easily than the collar portion 15, when the grommet 1 is attached, the elastic seal portion is 17 is deformed by a predetermined amount to a deformed length B. At this time, an elastic force acts on the deformed elastic seal portion 17, and the elastic seal portion 17 constantly presses the panel 23, so that the mounted state of the grommet 1 is reliably maintained and the hole portion 29 is formed. It is more effectively sealed and can be highly waterproof.

On the other hand, when the grommet 1 is attached to the panel 27 having the burring 25 formed at the height h, the flange portion 9 of the hard grommet 3 is fitted into the second fitting groove 21b of the soft grommet 5 as shown in FIG. After fitting, the hard grommet 3 is inserted into the hole 31 of the panel 27 and fitted as shown in FIG. At this time, the gap Z between the tip of the elastic seal portion 17 and the locking step portion 11a of the flexible locking claw 11 is set to be smaller than the burring height h by an appropriate amount, and the locking step of the flexible locking claw 11 is set. Since the gap g between the portion 11a and the flange portion 9 is kept constant and the elastic seal portion 17 is deformed more easily than the flange portion 15, when the grommet 1 is attached, the elastic seal portion 17 is deformed by a predetermined amount. As a result, the elastic length acts on the elastic seal portion 17 and the panel 23 is constantly pressed, so that the mounted state of the grommet 1 is surely maintained. , High waterproofness can be obtained.

Further, the deformation amount A-B of the elastic seal portion 17 when the grommet 1 is attached to the smooth panel 23 and the deformation amount A-C when the grommet 1 is attached to the panel 27 having the burring 25 are equal. This makes it possible to obtain the same mounting state and sealing performance regardless of the presence or absence of the burring 25. In order to make the deformation amounts A-B and A-C equal, the distance X between the first fitting groove 21a and the second fitting groove 21b is set from the burring height h of the panel 27 to the panel. It is sufficient to make it equal to the value ht obtained by subtracting the thickness t of 23.

Here, in the present embodiment, in order to mount the grommet 1 on two types of panels, a panel 27 with burring and a panel 23 without burring, the first fitting groove 21a and the second fitting groove 21b are installed. However, the present invention is not limited to this, and in the case of mounting on a plurality of types of panels having different burring heights, the number of fitting recesses is increased accordingly. As a result, the same effect as that of this embodiment can be obtained.

[0024]

[Effect of the device]

 As described above, according to the present invention, since the soft grommet is provided with the plurality of fitting recesses for fitting with the flange portion of the hard grommet, the tip of the one end of the soft grommet and the flexible lock of the hard grommet are locked. The distance from the claw can be changed according to the presence or absence of burring of the panel to be attached and the burring height, so that the same grommet ensures the attachment to the panel regardless of the burring of the panel. In addition, high sealing performance can be obtained at the time of mounting.

[Brief description of drawings]

FIG. 1 is a partial front sectional view of a grommet according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts when the soft grommet and the hard grommet of FIG. 1 are combined in a first fitting groove.

FIG. 3 is a sectional view of an essential part when the grommet of FIG. 2 is attached to a panel.

FIG. 4 is a sectional view of an essential part when the soft grommet and the hard grommet of FIG. 1 are combined in a second fitting groove.

5 is a cross-sectional view of an essential part when the grommet of FIG. 4 is attached to a panel.

FIG. 6 is a partial front sectional view of a conventional grommet.

FIG. 7 is a cross-sectional view of essential parts when the grommet of FIG. 6 is attached to a smooth panel.

FIG. 8 is a cross-sectional view of essential parts when the grommet of FIG. 6 is attached to a panel having burring.

FIG. 9 is a cross-sectional view of a main part when a grommet is attached to a panel having burring with a conventional hard grommet used when attaching to a panel having burring.

FIG. 10 is a front view of a conventional hard grommet used when mounting on a panel having burring.

[Explanation of symbols]

 1 Grommet 3 Hard grommet 5 Soft grommet 9 Flange portion 11 Flexible lock claw 11a Locking step portion 13 Base portion 17 Elastic seal portion 21a First fitting groove (fitting recess) 21b Second fitting groove (fitting) Recess) 23 panel 25 burring 27 panel 29 hole 31 hole

Claims (1)

[Scope of utility model registration request] 1. A hard grommet fitted in a panel hole, and a soft grommet into which a bundle of electric wires and the like are inserted and fixed, wherein the hard grommet is provided in a fitting recess provided in a base portion of the soft grommet. While fitting the hard grommet and the soft grommet by fitting the flange part provided on the flexible grommet provided on the outer peripheral part of the hard grommet and the flange part of the hard grommet, the panel is the panel. And a grommet that holds one end of the soft grommet, wherein a plurality of the fitting recesses are provided in the soft grommet.